Answer :

Final answer:

Plenum in automotive terms refers to the upper intake manifold which distributes air or air-fuel mixture to cylinders, impacting engine performance.


Explanation:

Plenum in automotive terms is another word for the upper intake manifold. It is a chamber attached to the intake manifold where the air or air-fuel mixture is distributed to the cylinders. The plenum's design plays a crucial role in optimizing engine performance.


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